There is more competition in the bow market right now than there seems to have been in years (decades). Mathews continues to dominate and take share thanks to their marketing. Darton's recent rapid growth means they are taking share from others - and it probably isn't Mathews or Hoyt - so PSE, Bowtech, Elite, Prime have probably all felt some new pressure. PSE mainly focusing on carbon hunting bows that are ~$2K also can't be a sustainable long-term strategy.
I think there's also an element where the average person that is into archery and bowhunts is more "into it" than previous generations. If archery / bowhunting is someone's primary hobby, the cost of upgrading every couple years really isn't that bad compared to say buying golf clubs, paying greens fees, range time, etc. or spending money on aftermarket car mods, etc.
I don't disagree with what everyone else said previously, the average guy is better served by buying a lessons not a new bow, cost of archery gear has outpaced inflation (although not by as much as people think), a new bow doesn't kill a deer any more dead, technology definitely plateauing, etc.